Offset perfecting-press.



UNITED STATES PATENT OFFICE.

DAVID JOHN SCOTT, OF PLAINFIELD, NEW JERSEY, ASSIGNOR T ISABELLA SCOTT AND DAVID J'. SCOTT, EXEGUTOBS OF WALTER SCOTT, DEOEASED.

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1,273,544. l Original application tiled April 2,

Plainfield in the county of Union and State of New .fers/ey, haveinvented certain new and useful Improvements in Offset Perfecting-Presses, of which the following is a specification. V

The present invention relates generally to olset erfecting presses and has more particular y reference to the eneral arrangement of the printing umts in the multi-color press of this type.

The present application is a division of an application Serial No. 18639 filed on April 2, 1915 and has for its main object an arrangement of the printing units and the members composing themv whereby both sides of the web are printed in several colors 2,0 by the olset process and without the omission of elements ,necessary to produce high class '.results; and, at the same time, to provide an arrangementV cylindersand other parts whereby all the working parts will Vbe completely accessible.

Another object of this invention is to provide means for convenientl controlling the various nstrumentalities t at make up the press.

The invention consists of the features of construction, combination of-parts and arrangement of jelements hereinafter del scribed, the preferred form embodying them 'being shown in the accompanying drawings. Changes may, however, be made 1n this particular formy without departing from the legitimate and intended scope of this invention. Y

In the drawing E and F represent two impression cylinders located innermost of the .machine and forming. the impression elementof two different units or Iccdples.4 Associated with theimpression cylinder E are form cylin ders A and A and blanket or transfer cylinders C and C. Y Associated with the impression cylinder F are two form-carrying cylinders B and B' `and blanket or transfer `eylindersvDand D. It will be noted that the form-carrying and transfer cylinders of each unit are arranged one above the other and, as here shown, with one form-carrying member at the upper end of the structure and another form-carrying member at the Specification of Letters Patent.

Patented July 23, 1918.

1815, Serial No 18,639. Divided and this application tiled September 29,

1916. Serial No. 122,834.

lower end' of the structure. It will also bc observed that the units are so grouped that the exposed operating sides formed by the form-carrying and ytransfer cylinders are located outermost of the machine, and that the impression cylinders E and F are located nen-adjacent to the operating side and innermost of the machine. Associated with each form-car ing cylinder is thc usual inking device When it is desired to employ dampening mechanisms such mechanisms may also be located as shown at N. In the form here shown the dampening mechanisms associated with the form-carry ing cylinders A and B are located nomad jacent to the operating side of the machine and intermediate the units of the impression oylinders,while the dampening mechanisms N associatedzwith the form-carrying cylmders A and B are Vlocated adjacent the lower end of the operating sides of the units.- 37 indicates an anti-smutting device engaging impression cylinder F and located intermediate the two impression cylinders. The object of this anti-smutting device is to prevent the previously printed side of the pa per from soiling or smutting the surface ot' the impression cylinder F.

I indicates a source of supply of paper in web form and K indicates a delivery, here shown conveniently as a lint delivery. The source of supply I and the delivery K are located adjacent to the outermost sides of the machine and are spaced therefrom to provide roomfor the platforms or gang ways G and II. The paper is led from the source of supply I ovcr the guiding rolls X', above the lst unit and to a point midway between the two units, thence downwardly between the units 'and over the guiding roll X2, thence to the impression cylinder E. thence across the space between the two units to the impression cylinder l", thence to the guiding rolls X"1 and to the delivery.

In order to admit of ready access lo the parts, transfer cylinders (l C and D D' are mounted in sliding boxes 54 in a well-known manner so that they muy be thrown off thc impression and form-carrying cylinders. Suitable means are provided for effecting this movement which nocd notI be described in detail except to say that the manipulation of handles 39 and 37 acts, through the system of levers indicated, to eifect the throwmost,

vand out of contact withV and out of oli of the cylinders. If desired, rods 120 may beemployed which connect the throwoff of two transfer cylinders so that two cylinders may be thrown oil' in unison by the operation of one handle. In the present inst,- ice, rod 120 connects two transfer cylinder on opposite sides of the machine.

Similarly, impression cylinders E and F arr provided with sliding,r boxes 54 which ar(` controlled from operating handles 14: and 'JB whereb the impression cylinders may be moved inwardly toward each other aid away from the coacting transfer cylinders. If desired, a rod 2G may connect the handles 14 and 28 so that the two cylinders may be thrown olflin unison. Both rods 120 and 26 are provided with a gab hook 36 so that the parts may be disconnected and each cylinder tripped independently of any other cylinder. k

In the present instance, the anti-smutting device 37 is mounted on a sliding box 54 of cylinder F so as to beinoved bodily with it. It will also be noted that the said anti-smutting device is located between the upper and lower runs of the web passing to and from impression cylinder F, and intermediate the two impression cylinders. These features are disclosed and claimed in a companion application filed Sept. 29, 1916, Serial No. 122,833. T he dampening ydevices are movably mounted with respect to the formcarrying cylinders and may be moved into same by means of lever 34 in a well-known manner.

From the foregoing, it will be seen that the paper in its passage through the machine receives an imprint on one side in several colors and then an imprint on the other side also in ci-sevrsl colors, 'there being a farmcarryingl cylinder, and a transfer cylinder for `each color, and an impression cfiinder en aging with a plurality of trans er cyl in ers.

What is claimed is:

1. A rotary multi-color offset perfecting machine comprising: a )lurality of units printin from'positive or'ms on opposite sides o impression receiving material, each unit consisting of two form-carrying and two transfer cylinders and an impression cylinder all of substantially the same di- 'ameter, -the form-carrying und transfer cylinders being arranged 1n a vertical column with one ferri-carrying cylinder uppermost and the other form-carrying cylinder lowerand the impression cylinder being arranged intermediate the transfer cylinders line with the` other cylinders to afford an exposed operating side for the unit, the units being grouped with their operating sides outermost and with the impression cylinder innermost.

2. A multi-coloro'set perfecting machin( comprising: two .side by Side units adapted each nait bring arranged outermost,4 and to print on opposite sides of the impression receiving material, each .unit inclndlng two form-carrying members, two transfer mem-` bers and one impression member, the formcarrying members and transfer members of each unit being arranged outermost to formv an exposed operating side, and the impression members ofthe two' units being arranged innermost and non-adjacent to the operating'sides ofthe machine, the units being grouped with their operatic sides outermost, and means for movingr t e impression members toward ,each other and awayfrom the cooperating transfer mem- 3. A multi-color offset perfectingv machine comprising: two side by side units adapted vto print on opposite sides of the impression receiving material, each unit including two form-carrying members, two transfer members and one impression member, the form-carrying meqnbe'rs and transfer members of each unit vbeing arranged outermost, and the impression members of the two units being arranged innermostA of the machine, the form-carryingland trans-v fer members of'each unit being located one above the other with 'one form-carrying member of eachunit uppermost and one` form-carrying member ofcach unit lowermost, dampemng mcchanlsm for 'the uppermost form-carrying member of ,each unit located `intermediate the unit, and dampening mechanism for the lowcrmost form-carrying member of each unit located adjacent to the outer side of the unit. x

4. A multi-color offset perfecting machine comprising: two side by `side units adapted to print on opposite sidesof the receiving material, each unit including two form-carrying members, two transfer members and one impression member, the formearrymg members and transfer members of the impression members of the two umts being arranged innermost of 'the 'machina the form-carrying and transfer members of each unit bein'glocated one abovefthe other'with i ofie form-carrying member' of each unit uppermost and one form-carryingmember of each unit lowermost, dampening m hpnigs for the uppermostxjform-carrymg ef impression y of each unit located, intermediate the gnit, i

dampening mechanism for the'lowerrost form-carryin member of each unit means for moving said dampeningjmech adjacent to t e outer side of the unit,` sped nisms toward and away from their ing form-carrying members. y .i

5. A rotary multi-color offset perfecting machine comprising: two sideby Side units adapted to print on oppositesides of the impression receiving material, each unit inlcluding t\vo"form-carrying cylinders, two transfer cylinders and one impression cyliniao der, the form-carrying cylinder and transcylinders inwardly of the machine toward fer cylinders of auch nnit being;r arranged euch other :md away from the coperating ontorlnnst :und the improsxinn cylinders of transfer cylinders. tlm two nuits being arranged innermost 0f Signed at Plainfield, in the county of 5 Hiv mnnliinf, the fnrnrcnrrying und transfer Uniun and Siate of New Jersey, this 27 day 15 cylinders nl' auch unit being located one nf Septmnber, A. l). 1916.

:lliure thv other with one forn1-cnmying DAVID JOHN SCOTT. rylmdvr ot much unit uppermost and une Witnesses: l0l'n1-cn1'ry1ng cylinder of nach nnlt` lower- CARL E. DRANGE,

10 mimi. und means lnr moving the' impression J. V. GOLES. 

